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You searched for: subject:"anisotropic"
[texts]Theory of anisotropic shells - Ambartsumyan, S. A
Theory of anisotropic shells
Keywords: ANISOTROPIC SHELLS; ANISOTROPIC SHELL
Downloads: 197
[audio]wake up - anisotropic
dark, hard tech prog
Keywords: anisotropic progressive techno
Downloads: 122
[texts]Theory of radiation from sources immersed in anisotropic media (Volume 68B) - Wait, James R.
Journal of Research of the National Bureau of Standards
Keywords: Anisotropic media; cold plasma; theory of radiation
Downloads: 81
[texts]Geomagnetic Cutoff Rigidity Computer Program: Theory, Software Description and Example - Smart, D. F.
The access of charged particles to the earth from space through the geomagnetic field has been of interest since the discovery of the cosmic radiation. The early cosmic ray measurements found that cosmic ray intensity was ordered by the magnetic latitude and the concept of cutoff rigidity was developed. The pioneering work of Stoermer resulted in the theory of particle motion in the geomagnetic field, but the fundamental mathematical equations developed have 'no solution in closed form'...
Keywords: ANISOTROPIC PLATES; ANISOTROPY; BUCKLING; LAMINATES; THERMAL EXPANSION
Downloads: 277
[texts]Methods of measuring the resistivities of anisotropic conducting media in situ (Volume 66C) - Rush, Stanley
Journal of Research of the National Bureau of Standards
Keywords: anisotropic media; chords; electrodes; conductivity; resistivity; slab
Downloads: 35
[texts]Thermal expansion of rutile from 100 to 700 �K (Volume 71A) - Kirby, Richard K.
Journal of Research of the National Bureau of Standards
Keywords: Anisotropic crystal; Gr�neisen's constant; interferometer; rutile; thermal expansion
Downloads: 42
[texts]Propagation of Rayleigh Waves in a Prestressed Layer over a Prestressed Half‐ space
This paper deals with the propagation of Rayleigh waves in a homogeneous, prestressed elastic layer of finite thickness over  a  homogeneous,  prestressed  elastic  half‐space.  The dispersion equation has been derived for a layer over a half‐space, when both media are considered as prestressed and the effect of initial stress shown in earlier investigators, is in general not applicable to the case of prestressed media, as well as the problem of Rayleigh waves has been solved by...
Keywords: Rayleigh Waves; Prestressed Media; Orthotropic Media; Anisotropic Media
Downloads: 10
[texts]Performance of Statistical Comparison Models of Solar Energy on Horizontal and Inclined Surface
Solar radiation data are essential in the design of solarenergy conversion devices. In this regard, empirical modelswere selected to estimate the solar radiation on horizontaland inclined surfaces. We used in this article eleven years ofsolar radiation over Cairo, Egypt from 1995‐2005, and usedthe statistical parameters ((MBE), (RMSE), MPE, R2), and t‐Test statics, in order to differentiate among these models andchoose the best model...
Keywords: Solar Radiation; Modeling; Isotropic Models; Anisotropic Models; Inclined Surface
Downloads: 17
[texts]Extension of the Flory-Rehner theory of swelling to an anisotropic polymer system (Volume 65A) - Bruck, Stephen D.
Journal of Research of the National Bureau of Standards
Keywords: Anisotropic; extension; Flory-Rehner theory; polymer system; swelling
Downloads: 267
[texts]STELLAR EVOLUTION. 5: THE CARBON-FLASH IN A STAR OF 5 SOLAR MASSES - KIPPENHAHN, R.
THE ONSET OF CARBON BURNING IN A STAR OF FIVE SOLAR MASSES AFTER EXHAUSTION OF ITS CENTRAL HELIUM CONTENT IS COMPUTED. SINCE THE IGNITION OF CARBON TAKES PLACE IN A DEGENERATE REGION, THE FLASH PHENOMENON OCCURS. THE COMPUTATIONS ARE CARRIED OUT UNTIL DEGENERACY IS REMOVED AND NUCLEAR BURNING BECOMES STABLE. DURING THIS PHASE THE HELIUM BURNING SHELL BECOMES LESS AND LESS IMPORTANT AS THE HYDROGEN IS AGAIN IGNITED AT THE INTERFACE BETWEEN THE OUTER HYDROGEN-RICH ENVELOPE AND THE HELIUM CORE.
Keywords: ANISOTROPIC MEDIA; RAREFIED PLASMAS; SOLAR WIND; DISCONTINUITY; EXPLORER 34 SATELLITE; HYDRODYNAMIC EQUATIONS; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS
Downloads: 98
[texts]Bell-Curve Genetic Algorithm for Mixed Continuous and Discrete Optimization Problems - Kincaid, Rex K.
In this manuscript we have examined an extension of BCB that encompasses a mix of continuous and quasi-discrete, as well as truly-discrete applications. FVe began by testing two refinements to the discrete version of BCB. The testing of midpoint versus fitness (Tables 1 and 2) proved inconclusive. The testing of discrete normal tails versus standard mutation showed was conclusive and demonstrated that the discrete normal tails are better...
Keywords: BUCKLING; CURVATURE; ANISOTROPIC PLATES; THERMAL EXPANSION; ELASTIC PROPERTIES; LAMINATES; LOADS (FORCES); CONTRACTION; MEMBRANE STRUCTURES; CRITICAL TEMPERATURE
Downloads: 75
[texts]Nuclear magnetic resonance of 113Cd and 199Hg in Cd-Mg and Cd-Hg solid solutions (Volume 77A) - Zhukov, V.V.
Journal of Research of the National Bureau of Standards
Keywords: Anisotropic Knight shift; Cd; Cd-Hg; internal Mg oxidation; isotropic Knight shift; Knight shift
Downloads: 37
[texts]NASA GRC Stirling Technology Development Overview - Thieme, Lanny G.
The Department of Energy, Lockheed Martin (LM), Stirling Technology Company, and NASA Glenn Research Center (GRC) are developing a high-efficiency Stirling Radioisotope Generator (SRG) for potential NASA Space Science missions. The SRG is being developed for multimission use, including providing spacecraft onboard electric power for NASA deep space missions and power for unmanned Mars rovers. NASA GRC is conducting an in- house supporting technology project to assist in developing the Stirling c...
Keywords: AXIAL COMPRESSION LOADS; ANISOTROPIC PLATES; SHEAR PROPERTIES; DEFORMATION; BUCKLING; LAMINATES; COEFFICIENTS
Downloads: 139
[texts]Stress-strain relations in laminar media - Khoroshun, L. P
Stress-strain relations in laminar anisotropic medium
Keywords: ANISOTROPIC MEDIA; LAMINATES; STRAIN DISTRIBUTION; STRESS DISTRIBUTION; STRESS-STRAIN RELATIONSHIPS; LAMINATED MATERIAL; STRESS-STRAIN DISTRIBUTION
Downloads: 90
[texts]Path antenna gain in an exponential atmosphere (Volume 63D) - Hartman, W.J.
Journal of Research of the National Bureau of Standards
Keywords: path antenna gain; exponential atmosphere; free space; aperture; illumination; half-power beamwidth; anisotropic turbulence
Downloads: 34
[texts]INVESTIGATIONS ON ROLLING DAMPING OF SLENDER WINGS - SCHLOTTMANN, F
THE AERODYNAMIC FORCES ACTING UPON SLENDER WING CONFIGURATIONS IN ROLL WERE MEASURED IN A LOW-SPEED WIND TUNNEL IN ORDER TO DETERMINE THE INFLUENCE OF VARIATION OF THE ANGLE OF ATTACK AND ROLL ANGULAR VELOCITY. IT WAS SHOWN, FOR THE DELTA- AND SQUARE-WING MODELS INVESTIGATED, THAT A NONLINEAR RELATIONSHIP EXISTS BETWEEN ROLLING MOMENT AND ROLL ANGULAR VELOCITY, AND RELATIONSHIP BETWEEN ROLL DAMPING AND ANGLE OF ATTACK...
Keywords: ANISOTROPIC MEDIA; PLASMA DYNAMICS; WAVE INTERACTION; INVERSIONS; LINEAR PREDICTION; MAGNETOHYDRODYNAMICS; PLASMA INTERACTIONS; SOLAR CORONA; WAVE EQUATIONS
Downloads: 82
[texts]Rayleigh Scattering Diagnostics Workshop - NON
The Rayleigh Scattering Diagnostics Workshop was held July 25-26, 1995 at the NASA Lewis Research Center in Cleveland, Ohio. The purpose of the workshop was to foster timely exchange of information and expertise acquired by researchers and users of laser based Rayleigh scattering diagnostics for aerospace flow facilities and other applications. This Conference Publication includes the 12 technical presentations and transcriptions of the two panel discussions...
Keywords: BUCKLING; ANISOTROPIC PLATES; LOADS (FORCES); GRAPHITE-EPOXY COMPOSITES; ANISOTROPY; STRUCTURAL ANALYSIS; LAMINATES; BENDING
Downloads: 155
[texts]PIV Measurements in the 14 x 22 Low Speed Tunnel: Recommendations for Future Testing - Watson, Ralph D.
During the period from February 4 to March 21, 2003 stereo digital particle imaging velocimetry measurements were made on a generic high lift model, the Trap Wing, as part of the High Lift Flow Physics Experiment. These measurements were the first PIV measurements made in the NASA, Langley Research Center 14 x 22 Foot Low Speed Tunnel, and several problems were encountered and solved in the acquisition of the data...
Keywords: ANISOTROPIC SHELLS; NUMERICAL ANALYSIS; SHALLOW SHELLS; EQUILIBRIUM EQUATIONS; DIFFERENTIAL EQUATIONS; DEFORMATION
Downloads: 86
[texts]The 727 airplane side inlet low-speed performance confirmation model test for refanned JT8D engines - Schuehle, A. L
The results of a low-speed wind tunnel test of a 0.3 scale model 727 airplane side inlet for JT8D-100 engines are presented. The objectives of the test were to develop lines for a full-scale flightworthy inlet, to evaluate inlet total pressure recovery and steady-state total pressure distortion, and to obtain model-scale distortion data which can be used in the assessment of the compatibility of the inlet with the JT8D-100 series engines...
Keywords: ANISOTROPIC MEDIA; BOLTZMANN TRANSPORT EQUATION; RADIATION DISTRIBUTION; DIFFUSE RADIATION; LAPLACE TRANSFORMATION; LIGHT SCATTERING
Downloads: 88
[texts]26. Eng Bearing Capacity Of Footing On Slopping Anisotropic Rock Mass D K Shukla - D K SHUKLA, MAHENDRA SINGH & K K JAIN
Rocks are inherently strong and stable to withstand loads. Rock mass bearing capacity governs by its discontinuities like folds, faults, bedding plane which could be assessed by various theories considering rock mass either isotropic or anisotrpic medium. Despite having strong and stable behavior, a jointed rock mass under unconfined condition has very low bearing capacity, sometimes rock mass collapse under its own weight...
Keywords: Bearing Capacity; Slopping Anisotropic Rock Mass; Plain Strain; Failure Modes; Rock Mass Buckling
Downloads: 8
[texts]11. Eng Variation In Bearing Capacity Of Footing On Slopping D K Shukla - D. K. Shukla, Mahendra Singh & K. K. Jain
The rock mass bearing capacity and its deformational behavior is governed by the interaction of intact blocks with the discontinuities in rock mass. Under very low confining pressure or unconfined stress condition, they dictate a major influence on strength and deformational behavior of the jointed rock mass. In this study, strength and deformational behavior of slopping anisotropic rock mass have been assessed experimentally as well as analytically...
Keywords: Bearing Capacity; Slopping Anisotropic Rock Mass; Plain Strain; Edge Distance; Failure Modes; Rock Mass Buckling
[texts]Delta Airlines LOFT training - Whitehead, J
A LOFT program was developed as part of the DC-9 training program which serves as a prototype for much of Delta's other aircraft training programs. The LOFT used differs little from the ideology presented in the Advisory Circular. Difficulty and experienced concerns regarding the effectiveness of LOFT as a complete training vehicle are explored.
Keywords: ANISOTROPIC PLATES; ELASTIC BENDING; LAMINATES; SHEAR STRESS; BENDING MOMENTS; CONSTITUTIVE EQUATIONS; DISPLACEMENT; ISOTROPY; STRESS ANALYSIS
Downloads: 192
[texts]BSTJ 54: 6. July-August 1975: Coupled-Mode Theory For Anisotropic Optical Waveguides. (Marcuse, D. )
Bell System Technical Journal, 54: 6. July-August 1975 pp 985-995. Coupled-Mode Theory For Anisotropic Optical Waveguides. (Marcuse, D. )
Keywords: modes; dielectric; waveguides; anisotropic; transverse; mode; equations; tensor; coupling; waveguide; bell system; anisotropic media; dielectric tensor; optical waveguides; guided modes; dielectric waveguides; transverse parts; radiation modes; system technical; wave propagation
Downloads: 29
[texts]Study of a global search algorithm for optimal control - Brocker, D. H.
Search algorithm for optimal control computer programming
Keywords: FINITE DIFFERENCE THEORY; VISCOPLASTICITY; INFLATABLE STRUCTURES; NONLINEARITY; ANISOTROPIC SHELLS; CONFERENCES; EQUATIONS OF MOTION; PLASTICS; STIFFNESS; STRESS DISTRIBUTION
Downloads: 105
[texts]Evaluation of insulation materials and composites for use in a nuclear radiation environment, phase 2 - Westerheide, D. E.
The nuclear heating of the propellant in all of the four baseline RNS configurations studied was much lower than that of the nuclear flight module configuration with the 5000-MW NERVA analyzed previously. Although the nuclear heating has been reduced, the effect of nuclear heating on the propellant as well as the effect of nuclear heating on internal structures such as antivortex baffles, screens, and sump components cannot be neglected...
Keywords: ANISOTROPIC MEDIA; MAGNETIC FIELDS; PLASMA DYNAMICS; SHOCK WAVES; COLLISIONLESS PLASMAS; CONSERVATION EQUATIONS; MAGNETOHYDRODYNAMIC STABILITY; SOLAR WIND; STEP FUNCTIONS
Downloads: 64
[texts]Development and Certification of Pratt and Whitney's Fuel and LOX Pumps - Mitchell, William S
The development testing of the Pratt & Whitney's SSME Fuel and Lox Turbopumps has proven to be extremely valuable in preparation for Certification and Flight Readiness. Design 'lessons learned' from this program highlights the importance of overall systems engineering, including aerodynamic, thermal, mechanical, and materials systems.
Keywords: ANISOTROPIC PLATES; STRESS INTENSITY FACTORS; COMPOSITE STRUCTURES; CRACK TIPS; FRACTURE MECHANICS; WING PANELS; DEFORMATION; FORMALISM; J INTEGRAL; REISSNER THEORY
Downloads: 66
[texts]Theory of stability of thin elastic heterogeneous anisotropic plates of variable rigidity - Shulezhko, P. G
Stability theory for thin elastic heterogeneous anisotropic plates of variable rigidity
Keywords: ANISOTROPIC PLATES; ELASTIC PLATES; STRUCTURAL STABILITY; THIN PLATES; BENDING; BUCKLING; DIFFERENTIAL EQUATIONS; MODULUS OF ELASTICITY; STRESS ANALYSIS
Downloads: 97
[texts]Validation Results for LEWICE 2.0 - Wright, William B.
A research project is underway at NASA Lewis to produce a computer code which can accurately predict ice growth under any meteorological conditions for any aircraft surface. This report will present results from version 2.0 of this code, which is called LEWICE. This version differs from previous releases due to its robustness and its ability to reproduce results accurately for different spacing and time step criteria across computing platform...
Keywords: ULTRASONIC RADIATION; SOUND PRESSURE; PRESSURE DISTRIBUTION; CYCLES; ANISOTROPIC MEDIA; WAVE DIFFRACTION; ULTRASONIC TESTS; ULTRASONIC WAVE TRANSDUCERS; WOVEN COMPOSITES; NONDESTRUCTIVE TESTS; ACOUSTIC FREQUENCIES; WAVE PROPAGATION; DIFFRACTION PATTERNS
Downloads: 187
[texts]Linkages Between Global Vegetation and Climate: An Analysis Based on NOAA Advanced Very High Resolution Radiometer Data - Los, Sietse Oen
A monthly global 1 degree by 1 degree data set from 1982 until 1990 was derived from data collected by the Advanced Very High Resolution Radiometer on board the NOAA 7, 9, and 11 satellites. This data set was used to study the interactions between variations in climate and variations in the ''greenness'' of vegetation. Studies with the Colorado State University atmospheric general circulation model coupled to the Simple Biosphere model showed a large sensitivity of the hydrological balance to ch...
Keywords: MODELS; BORN APPROXIMATION; CROSS POLARIZATION; ISOTROPY; MICROWAVE FREQUENCIES; SEA ICE; SENSITIVITY; SNOW COVER; ELLIPSOIDS; SCATTERING; REMOTE SENSING; POLARIMETRY; ANISOTROPIC MEDIA; ATMOSPHERIC BOUNDARY LAYER; ALIGNMENT; BACKSCATTERING
Downloads: 122
[texts]generalmanual 000015750
generalmanual 000015750
Keywords: settings; ati; display; slider; quality; application; click; allows; monitor; texture; custom settings; compatibility settings; anisotropic filtering; software suite; game gamma; main settings; high quality; graphics accelerator; application preference; refresh rate
Downloads: 3
[texts]generalmanual 000068005
generalmanual 000068005
Keywords: display; settings; ati; slider; click; monitor; quality; button; tab; opengl; custom settings; main settings; game gamma; compatibility settings; ati displays; anisotropic filtering; catalyst software; application preference; software suite; smooth vision
Downloads: 3
[texts]generalmanual 000015751
generalmanual 000015751
Keywords: display; settings; ati; slider; click; opengl; monitor; quality; application; button; custom settings; application preference; anisotropic filtering; game gamma; compatibility settings; ati displays; main settings; catalyst software; software suite; smooth vision
Downloads: 3
[texts]Energetic Particle Propagation in the Inner Heliosphere as Deduced from Low Frequency (less than 100 kHz) Observations of Type III Radio Bursts - Cane, H. V.
Solar energetic particle (SEP) events are well-associated with solar flares. It is observed that the delay between the time of the flare and the first-arriving particles at a spacecraft increases with increasing difference between the flare longitude and the footpoint of the field line on which the spacecraft is located. This difference we call the ''connection angle'' and can be as large as approximately 120 deg...
Keywords: ANISOTROPIC PLATES; CRITICAL TEMPERATURE; DIMENSIONAL ANALYSIS; PARAMETER IDENTIFICATION; MECHANICAL PROPERTIES; COOLING; LOADS (FORCES); STRUCTURAL DESIGN; THERMAL EXPANSION; LAMINATES; DIMENSIONLESS NUMBERS; THERMAL BUCKLING; STRUCTURAL ANALYSIS; ANISOTROPY; STRESS ANALYSIS; SPACECRAFT DESIGN
Downloads: 85
[texts]generalmanual 000001257
generalmanual 000001257
Keywords: settings; ati; display; slider; click; radeon; monitor; quality; application; button; custom settings; game gamma; application preference; compatibility settings; ati displays; anisotropic filtering; image quality; software suite; smooth vision; catalyst software
Downloads: 4
[texts]generalmanual 000015609
generalmanual 000015609
Keywords: display; settings; ati; slider; click; monitor; connector; radeon; button; quality; custom settings; crt display; application preference; smooth vision; game gamma; compatibility settings; ati displays; high quality; full screen; anisotropic filtering
Downloads: 4
[texts]generalmanual 000015747
generalmanual 000015747
Keywords: ati; settings; tab; display; slider; click; monitor; radeon; quality; button; custom settings; game gamma; application preference; refresh rate; graphics card; compatibility settings; anisotropic filtering; image quality; ati displays; software suite
Downloads: 4
[texts]BBC Research and Development Report Number 1962-37
R&D Report 1962-37 : Symposium of electromagnetic theory and antennas, Copenhagen, 25th - 30th June 1962 H. Page, P. Knight A report on the Symposium on Electromagnetic Theory and Antennas held in Copenhagen 25-30 June 1962. A total of 140 papers were presented, covering various areas of Electromagnetic and Antenna theory. In this report it is therefore proposed to indicate only the broad trends of current research, with more detailed reference to those papers directly related to broadcasting pr...
Keywords: aerials; propagation; radiation; waveguides; arrays; electromagnetic; anisotropic; aerial; diffraction; papers; swedish tower; ring aerials; radiation pattern; wave propagation; stratified media; vertical radiation; papers presented; electromagnetic theory; surface waves; partial coherence
Downloads: 29
[movies]MIT3.60F05 - MIT OpenCourseWare
This course covers the derivation of symmetry theory; lattices, point groups, space groups, and their properties; use of symmetry in tensor representation of crystal properties, including anisotropy and representation surfaces; and applications to piezoelectricity and elasticity.
Keywords: crystallography; rotation; translation; lattice; plane; point group; space group; motif; glide plane; mirror plane; reflection; spherical trigonometry; binary compound; coordination number; ion; crystal structure; tetrahedral; octahedral; packing; monoclinic; triclinic; orthorhombic; cell; screw axis; eigenvector; stress; strain; anisotropy; anisotropic; piezoelectric
Downloads: 4,436
[movies]MIT3.60F05 - MIT OpenCourseWare
This course covers the derivation of symmetry theory; lattices, point groups, space groups, and their properties; use of symmetry in tensor representation of crystal properties, including anisotropy and representation surfaces; and applications to piezoelectricity and elasticity.
Keywords: crystallography; rotation; translation; lattice; plane; point group; space group; motif; glide plane; mirror plane; reflection; spherical trigonometry; binary compound; coordination number; ion; crystal structure; tetrahedral; octahedral; packing; monoclinic; triclinic; orthorhombic; cell; screw axis; eigenvector; stress; strain; anisotropy; anisotropic; piezoelectric
Downloads: 13,669
[texts]Reflectron Time-of-Flight Mass Spectrometer (REMAS) Instrumentation - Brinckerhoff, W. B.
The restricted mass and power budgets of landed science missions present a challenge to obtaining detailed analyses of planetary bodies. In situ studies, whether alone or as reconnaissance for sample return, must rely on highly miniaturized and autonomous instrumentation. Such devices must still produce useful data sets from a minimum of measurements. The great desire to understand the surfaces and interiors of planets, moons, and small bodies had driven the development of small, robotic techniq...
Keywords: BRITTLE MATERIALS; FLEXING; ANISOTROPIC PLATES; CIRCULAR PLATES; FRACTOGRAPHY; FRACTURE MECHANICS; COMPONENT RELIABILITY; AXIAL STRESS; STRESS ANALYSIS; FRACTURE STRENGTH; NICKEL ALUMINIDES; RELIABILITY ANALYSIS; SINGLE CRYSTALS; WEIBULL DENSITY FUNCTIONS; FLEXURAL STRENGTH; ELASTIC ANISOTROPY; STRUCTURAL DESIGN
Downloads: 116
[texts]Galaxy Clustering Around Nearby Luminous Quasars - Fisher, Karl B.
We examine the clustering of galaxies around a sample of 20 luminous low redshift (z approximately less than 0.30) quasars observed with the Wide Field Camera-2 on the Hubble Space Telescope. The HST resolution makes possible galaxy identification brighter than V = 24.5 and as close as 2 arc-seconds to the quasar. We find a significant enhancement of galaxies within a projected separation of approximately less than 100 (h exp -1)kpc of the quasars...
Keywords: FIBER OPTICS; DAMAGE ASSESSMENT; IMPACT DAMAGE; AIRCRAFT MAINTENANCE; ELECTRONIC EQUIPMENT TESTS; AIRCRAFT CONSTRUCTION MATERIALS; ALGORITHMS; STRESS WAVES; REFRACTIVITY; RESIN MATRIX COMPOSITES; ANISOTROPIC PLATES; OPTICAL FIBERS; BRAGG ANGLE; SIGNAL TRANSMISSION; RESIDUAL STRESS; CLADDING; PHOTOSENSITIVITY; POSITION (LOCATION); NEURAL NETS; NONDESTRUCTIVE TESTS; METAL COATINGS; FABRY-PEROT INTERFEROMETERS; STRAIN GAGES; TENSILE STRESS; SIGNAL DETECTION
Downloads: 74
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